This image from Play Raw
DSC_0101.NEF (9.3 MB)
is of a bottle, when rotated (-2.5º) or transformed with perspective the top of the bottle disappears from the RT frame and is gone.
This image also from Play Raw _1080087.RW2 (22.5 MB) where there is a lot of in camera cropping looks like this in darktable when the lens correction is turned off
compared to this in rawtherapee
it’s a manufacturer supplied lens hood (not asking for a lens profile) where at the widest end, minimum focus the image embedded in the RAW crops the hood, but because RT has no ability to work outside it’s viewport (afaik) one can’t crop like the embedded only from the viewport downwards.